Carbureter.



W. BGKBRT.

ARBUBETEB.

Arrmoulox Hmm .1mm 18,1908.

Patented Feb. 23, 1909.

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WHITNEY EGKER'I, OF STAMIVORD, CONNECTICUT.

CARBURETER.

Specification of Letters Patent.

Patented Feb. 23, 1909.

Application filed June 16, 190B. Serial No. 438,764.

To all whom it may concern:

Be it known that I, VHITNEY Eoxnn'r, a citizen of the United States,residing at Stamford, in the county of Fairfield and State ofConnecticut, have invented certain new and useful Improvements inCarbureters, of which the following4 is a specification, reference beinghad to the drawings ac companying and forming a part of the same.

The invention Which forms the subject of my present application is animprovement on the carbureter set forth and claimed in my a plication,Serial No. 427,683, filed in the nited States Patent Oiiice on April 17,1908. In the carbureter disclosed in the said application, there isemployed a valve for controlling the admission of air to the mixingchamber, which is adapted to be raised or opened by a partial vacuumcreated Within the carbureter by the operation of the engine piston orpistons; which valve carries or is provided with an extension integraltherewith, constituting a slide valve for controlling the admission ofhydrocarbon to the mixing chamber.

In my present improvement, While preserving the same generalconstruction of the other parts and providing for a similar mode ofoperation of the device as a whole, the hydrocarbon controlling valve isa gravity valve independent of, but directly controlled by, the movementof the air valve and is so arranged as to secure in its operation aresult in certain respects different from and superior'to that obtainedby the former ty e.

The invention Will be described by re'erence to the accompanyingdrawing, the single figure of which is a central vertical section of theimproved valve mechanism connected with a carbureter of the kindheretofore described and now shown, onl so far as is necessary to anunderstanding o its operation, for purposes of illustration.

The mixing chamber of the carbureter is indicated by the numeral 1.Surrounding this mixing chamber is an outer casing 2, preferably ofsimilar form but large enough 1n diameter and height to leave an airspace or chamber around and above the mixing chamber, as shown at 3 and4, for the passa e of air admitted through a pipe 5.

he top ofthe mixing chamber 1 is formed by a late 6, having a centralaperture, surroun ed by an upwardly extending tubular neck 7, in whichis iitted a cylindrical valve member 8, capable of reciprocating movelment in said neck.

At the upper end of said valve member is an outwardly extending orhorizontal flange 9, adapted to seat, when said valve member is in itslowest position, on the upper edge of the neck 7, and also on a flangeor shoulder on the surrounding wall of the upper portion of the casing2. It will be seen that when the valve member 8 is in its normalposition the fiange 9 spans and covo5 ers the annular' ort formedbetween the neck T and the slioulder 10, and therefore closes theannular passage through which air is drawn into the mixing chamber I,through the pipe 5.

The top of the outer casing 2 is closed by a casting 11, secured bysuitable screws or bolts to a iiange I3, and through the center of saidcasting or cover an opening is formed constituting a chamber forcontaining the hydrocarbon supply valve and its appurtenances, ashereinafter described.

The construction of the parts thus far described is substantially thesame as that present in the carbureter described in my pendingapplication above referred to.

Across the upper end of the valve member 8 extends a spider or series ofarms radiatimr from a hub 14 having a central aperture, an( above thisvalve member, and having its lower end projecting down through the hub14 is the hydrocarbon valve constructed and arranged as follows: Vorkingfreely within the bore or chamber in the casting 11 is the valve 15,consistin of a metal body, c lindrical in form, and with portions of tree substantially different diameters. The upper end 16 of the valvebody is the part of greatest diameter, and has a beveled shoulder oiningit to the intermediate portion 17 95 of smaller diameter. The lowerportion I8, of smallest diameter, is threaded to receive a ianve or headi9, provided with a downwar ly extending boss 20, and working freely ina circular recess 2l in the under side of the 100 casting 11, v-.hichforms an air chamber or dash-pot. The head 19 is held securely to thevalve body after being screwed in osition by a threaded key 22. A lonitu inal passage 23 is bored through the va ve body 1 05 15, from itslower end, to meet a transverse assage or bore 24, immediately below thelieveled shoulder, and two or more passages or ducts 25, 26, areprovided in the casting 11 adapted for connection with an oil supply atone end, and openinU into the valve chamber at the inclined shoulder orledge corresponding to and formn a conical seat for the beveled shoulderon t e valve body 15. The upper portion of the valve chamber isinternally threaded to receive a threaded washer 27, which is capable ofvertical adjustment by any suitable means, and surmounted by a screw cap28.

It will be understood that more than two passa es 25, 26, may be used,or only one, and t at the same is true with regard to the transversepassage 24.

The o eration of the device is as follows: The was er 27, being raisedto permit the desired amount of play to the valve 15, and the enginecranked or starting, the valve memA ber 8 will be raised from its seatby the suction of the engine to admit air. In the upward movement ofthis valve the hub 14 encounters the boss 20, and raises the valve 15from its conical seat. Hydrocarbon from one or more ofthe passages 25,26 flows down through the central bore of valve 15, and is sprayed oratomized by the inrushin f charges o 'air subse uently admitted througthe top and throug the series of holes 29 in the valve 8, and carriedalong with the air into the mixing chamber below.

In practice I have found that under normal running conditions and properadjustment the valve 8 a parently remains open continuously, and t iatexactly the roper amount of h drocarbon is thus supp ied. In other wors, the reciprocaton of the valve is hardly detectable, and it ap ears tomerely flutter. This condition is a tered to a perceptible reciprocationon a reduction of speed due to any cause, so that the supply ofhydrocarbon is to a large extent regulated automaticall The play andconsequent feed of the valve 15 may be iixed in any position ofadjustment to meet any desired conditions of running, and in operationthe device works smoothly and evenly. The bearing surfaces being reducedto a minimum, the `parts are little subject to wear, and immediatelyupon the cessation of movement of the valve 8 the supply of hydrocarbonis effectually and automatically shut off.

What I claim is:

1. In a carbureter, the combination with a valve for controlling theadmission of air to the mixing chamber, of an independent gravity valvein its path of movement for controlling the admission of hydrocarbon,said oil valve having one or more ducts or passages through its body,and a conical portion controlling oil ports entering the valve chamberthrough a corresponding conical seating portion of the same, as setforth.

In a carbureter, the combination with a valve for controlling theadmission of air to the mixing chamber, of an independent gravity valvein the )ath of movement of the air valve for controlling the admissionof oil, said oil valve having a fiange or head at its lower end Workingin a recess or air chamber, as set forth.

WHITNEY ECKERT. Witnesses:

M. LAwsoN DYER, S. S. DUNHAM.

